I also have a K90 although it is new.
Sometimes when I go back to Centrafuse or Windows after hibernation, he only accepts the right side of the screen.
It seems that the Windows cursor is 4 cm to the right side.
Can this be with resolution?
Because normally it accepts 800x480 but I can only set it to 800x600.
Damned EPIA m10000
When I connect a USB mouse & perform the 4 point calibration he remembers again for a few days/ few hibernations.
For your information it is connected via this way.
PC ====Active USB cable =>>> Powered hub =>>>> Touchscreen